Endosymbiosis- Theory that the Evolution of the Eukaryotic Cell arose from the symbiosis of different species of prokaryotes. Protista=“the first” eukaryote.

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1 Endosymbiosis- Theory that the Evolution of the Eukaryotic Cell arose from the symbiosis of different species of prokaryotes. Protista=“the first” eukaryote

2 The Kingdom of Protista=Paraphyletic Why? Because the ancestral Eukaryote of the protists also gave rise to plants, fungi, and animals. One group of protists shares a more recent ancestor with plants, one with fungi, and one is most closely related to animals.

3 The Protista (“First of all”) is composed of predominantly single-celled eukaryotic organisms dating back 1.5 billion years. Protists are usually unicellular with intracellular specialization where the organelles divide the “labor” within the cell. (some are colonial or multicellular). Most Protists reproduce asexually and in some cases, sexually. Protists respond to stimuli with simple reflexes and some have means of locomotion using flagella, cilia or pseudopodia. These organisms can be heterotrophic, saprozoic and/or autotrophic.

4 The following slides are examples of protista that you need to know for your quiz

5 An example of the earliest free-living eukaryotes to possess mitochondria. Many are photosynthetic, some heterotrophic or parasitic. Example: Euglena

6 Euglenozoa Example: Trypanosoma

7 Example of Ciliates: Stentor Spirostomum organisms have a flattened membranous sac beneath outer cell membrane. This group includes ciliates, dinoflagellates (photosynthetic), and the apicomplexans (spore forming parasites).

8 producers Example: Plasmodium-parasite that causes malaria

9 Green algae: a sister group of green plants. Example: Micrasterias and others

10 Amoebas and others

11 Foraminifera Radiolaria

12 Choanoflagellata: (means “collared whiptail”) Sister Group to the Animals! Simple diagram of sponge body showing flagellated,collared, cells. Colonial Form

13 Theory for the evolution from colonial choanoflaggelate protist to first sponge-like proto-animal.

14 These are primitive eukaryotes that lack mitochondria Example: Giardia

15 Following are additional examples of protista that are not on your quiz.

16 Diplomondia and Parabasalida - Giardia

17 Dinoflagellate =responsible for red tide Example: Ceratium

18 Brown algae (marine: kelp), water molds and diatoms (contain chlorophyll) Example: Diatoms

19 Red Algae